miller



B. F. & LG. MILLER.

Chimney Cap.

No. 107,282. Patented sept. 13, 1870.

\ y C/ I l Inf/@raars fm ymmiwd ,gtates BENJAMN F., MILLER ANDV JOSEPH'Letters .Patent 4No'. 107,282

e. MILLER, or NEW torni, N. Y.

, dated S'eptmnber 13, 1870.

CHIMNEY-OAP.

The Schedule referred to in these Lettere Patent and making part of thesame.

ncy-cap that willr be rotated either hy the5 ascending current ot` airfromthe chimney, or by currents ot' air acting in any direction uponsaid cap from outside the chimney or tine, to increase the draught ot'the chimney, and prevent any current 'oi' air descending into vided witha cone, to set around the lower part ot' the Lone of the cap, andprotect the said spindle from sont, &c.

ln the drawing,.-`

Figure 'l is a. plan oi" our improved ehimncy-c.ip;

Figure 2 is an elevation; and

Figureii is a vertical section oi' the saine,V

n represents a short metal cylinder placed upon or iin-ming the top ot'the chimney or tlne. lWithin this cylinder the vertical spindle I; isattached by a cross-piece, and receives the cone c, said .cone e beinggri'ornied with the bearing l at the upper part, and with the cylindricalpart 0 at the lower portion, said cylindrical portion forming a guide tostead y the cone in its rota-tion upon the spindle.

.lhc wings h are placed upon the conc e at suitable distances apart.- Weprefer to attach the lower parts ot the wings to the cone on the line ofa radial plane to the cone, and curve the upper portion of eachwingdownto nearly a horizontal position near the inverted hase ot' theconc. This allows the-lateral currents of air to act upon the parts ofthe wings below the points i, while the ascending currents of air,-either i'roni inside the chimney or from the outside, will act upon thewings near the upper part or inverted base ot' the cone, and giverotation to the capf,

A. conc, l, is provided upon the spindle b, and sets around the lowerpart of vthe cone e, and prevents soot accumulating around the spindle,as the smokeis detlccted by said conc, and passes out around the coneand wings 71.

cross-bar between the wings`0r deiiectorsand the'hole through which thepivot passes. This is liable to become bent or obstructed by soot andthe revolution of the cap interfered' with.

The cone used in oui" cap lenders this cross-piece nnneeessary,'aml, atthe same time, surrounds and protects the pivot from becomingobstructed.

The cap or top t of thc cone should be ot' a domeshape, to shed water,and this cap may be put upon the cone after the wings have been rivetedin place.

lVc claim as our invention- 1. The inverted cone surrounding vthe pivotor spindle, andsustaining` the wings or detleetors that are above theline or chimney, substantially as setfort-h.

2. A revolving chimney-cali, made of an inverted cone, with curved wingsattached to the surface, sub'- stantially as and for the purposesspecified.

Signed this 31st day of May, A. 1870.

' B. F. MILLER.

JOS. G. MILLER.A

Witnesses:

CHAs. H. SMHH, Gao. 1. PINCKNEY.

